<!DOCTYPE html>
<html lang="zh-CN">
    <head>
        <meta charset="UTF-8" />
        <title>01_复习</title>

        <style>
           div {
                color: red;
           }

           div {
            color: green;
           }

        </style>

    </head>
    <body>
        <div>
            昨天天气很凉快
        </div>

        <div>
            今天天气很热
        </div>
    </body>
</html>